Speed Conversions
4 units · 12 converters
Convert between kilometers per hour, miles per hour, meters per second and knots. Exact factors for driving, aviation, sailing and physics.
Kilometer per Hour(km/h)
Kilometers per hour is the standard speed unit for road traffic in metric countries, expressing how many kilometers are covered in one hour. Speed limits and car speedometers use km/h.
Meter per Second(m/s)
Meters per second is the SI derived unit of speed, used in physics and engineering. Wind speeds in meteorology and velocity in science are typically quoted in m/s.
Mile per Hour(mph)
Miles per hour is the road speed unit in the United States and the United Kingdom, expressing how many statute miles are covered in one hour. One mph equals exactly 0.44704 m/s.
Knot(kn)
A knot is one nautical mile (exactly 1,852 meters) per hour. It is the standard speed unit in aviation, maritime navigation and meteorology worldwide.